Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1583251 | Materials Science and Engineering: A | 2008 | 7 Pages |
Abstract
On the basis of the vacancy-solute complex mechanism, a model describing deformation-induced non-equilibrium grain boundary segregation of solute is established for dilute alloys, which includes the quasi-thermodynamics and kinetics. The model is applied to the evaluation of non-equilibrium grain boundary segregation of boron during high temperature plastic deformation in an austenitic steel microstructure. The deformation-induced non-equilibrium segregation increases with decreasing temperature and is considerably larger than the thermal equilibrium one, especially in the temperature range below â¼750 °C. In addition, at a given temperature the non-equilibrium segregation augments with rising strain rate as the deformation-created supersaturated vacancy concentration increases. The predictions are generally consistent with some experimental observations.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
S.-H. Song, Q. Zhang, L.-Q. Weng,